TinyMCE Cross-Site Scripting (XSS) vulnerability through `mce:protected` comments
GHSA-v98h-vmpc-fpqv · CVE-2026-47762
Published · Modified
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Description
Impact
Stored XSS vulnerability via forged mce:protected comments. Allows attackers to bypass sanitization and inject scripts that execute when content is restored. Impacts users who utilize the protect option.
Patches
Patched by validating decoded mce:protected content against configured protect regex rules before restoring. Users should upgrade to the latest patched version.
Workarounds
No official workaround available.
Fix
To avoid this vulnerability:
Upgrade to TinyMCE 8.5.1 or higher.
Upgrade to TinyMCE 7.9.3 or higher.
Upgrade to TinyMCE 5.11.1 LTS or higher for TinyMCE 5.x (only available as part of commercial long-term support contract).
Acknowledgements
Tiny thanks Ivan Babenko for their help identifying this vulnerability.
References
- WEB https://github.com/tinymce/tinymce/security/advisories/GHSA-v98h-vmpc-fpqv
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-47762
- PACKAGE https://github.com/tinymce/tinymce
- WEB https://www.tiny.cloud/docs/tinymce/7/7.9.3-release-notes/#overview
- WEB https://www.tiny.cloud/docs/tinymce/8/8.5.1-release-notes/#overview
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